Transparisteel

Transparisteel or transparasteel was a hard and completely transparent metal alloy. This made it a commonly used material for starship viewports, and the windows of strongholds, and other buildings where security was a must. In starship viewports, transparisteel could be made phototropic to become more opaque near bright explosions, while traveling through hyperspace, and such. A major component in the make-up of transparisteel was lommite.